The potential application of red cabbage indicator film as smart packaging on tuna fillet

Abstract

Edible film made from chitosan used as a place of attachment of red cabbage pigment extract then formed in size (2 × 2) cm expressed as a smart indicator. This research uses ethanol 96% in the solvent extraction process with a method of maceration-sonication. Sensitivity indicators tested on samples of fish fillet of tuna in the wrapping plastic with the parameters of the analysis involves determining the number of TVBN, TMA and TPC and discoloration during testing from research results on temperature freezer (-6°C), cool temperature (10°C), and room temperature (28°C). The results showed that visually smart discoloration indicator from conditions early purple, blue, and then green. On the temperature of the freezer (-6°C) discoloration smart indicator has more time for 365 hours from purple to green, compared to the cool temperature (10°C) for 149 hours, and room temperature (28°C) for 31 hours. Discoloration on smart indicators occurs also increased the value of TVBN, TMA and TPC during storage at each temperature. The smart indicator pigmented red cabbage product has an excellent sensitivity with a plot purple representing the conditions of packaged fresh ingredients, blue (worth consumed), and green (foul).